Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!pawl.rpi.edu!ralii
From: ralii@pawl.rpi.edu
Newsgroups: comp.sys.dec.micro
Subject: Graphics modes on the Rainbow
Message-ID: <8902040308.AA02226@pawlsub.rpi.edu>
Date: 4 Feb 89 03:08:32 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 19


To whom can ever help me,

     I have a very technical question about the graphics on the Rainbow.
First, I realize how to put the RB 100 A/B/+ into graphics mode, etc.
because I have the technical docs, but I could not seem to find this:

    How, once graphics mode is initialized, do you know how it was
initialized?  Is there a port or location in screen memory that will
have this information, accurately at all times?  Most importantly,
are you in Medium or High Res?

     I already know a little about port 0Ah and its bit 2 on video
selection.  Ports 50h - 5fh should have some kind of capability such
as I described, but maybe not :-).

     I would appreciate a point in any direction.  Thanks in advance.

---Dick Locke